在web.xml的
<welcome-file-list>上面增加:<!-- mime-mapping -->
<mime-mapping>
<extension>xls</extension>
<mime-type>application/vnd.ms-excel</mime-type>
</mime-mapping>
<welcome-file-list>上面增加:<!-- mime-mapping -->
<mime-mapping>
<extension>xls</extension>
<mime-type>application/vnd.ms-excel</mime-type>
</mime-mapping>
<web-app>
<servlet-mapping>
<servlet-name>jsp</servlet-name>
<url-pattern>*.xls</url-pattern>
</servlet-mapping> <mime-mapping>
<extension>xls</extension>
<mime-type>text/plain</mime-type>
</mime-mapping>
</web-app>